NET LOSS PER SHARE - Schedule of Calculations of Basic and Diluted Net Income (Loss) Per Share and Potential Common Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Net loss	$ (24,222)	$ (8,998)
Denominator:
Denominator for basic net income (loss) per share - weighted average common shares outstanding (in shares)	91,180	93,344
Dilutive common equivalent shares:
Weighted average restricted stock units (in shares)	0	0
Denominator for diluted net income per share - weighted average shares outstanding (in shares)	91,180	93,344
Net loss per share:
Basic net loss per share (in USD per share)	$ (0.27)	$ (0.10)
Diluted net loss per share (in USD per share)	$ (0.27)	$ (0.10)